40% of 20 is 8
8 is the answer
        
                    
             
        
        
        
Ooooppppppp— homie not gettin nun at home I see
        
             
        
        
        
Answer:
The diagonal of kite intersect at the point p is C. 68°
 
        
             
        
        
        
Haha, there isn't a thing that makes you 'really smart'. 
However, you can grow and improve your knowledge.
The more challenging material you expose yourself to, while putting in the effort to solve them, there's no doubt you'll definitely improve!
+ you can try exercising your brain every now and then by playing trivia games or reading books- do whatever interests you and helps you learn!